Answer:
Step-by-step explanation:
If we are to write an equation of the form 
, then the function is linear; therefore, it has a constant slope 
.
The slope of the function is given by
thus we have
Now we find 
from the fact that the first month of service costs $72.99, which gives us 
, or
Substituting the values of and , we get our equation in the final form:
Answer:
the answer is 12
Step-by-step explanation:
12÷4 =3-3=0
36 is the length of altitude of equilateral triangle below
